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Solid base catalyst for synthesis of glycerol carbonate and its preparation method and application

A technology of solid base catalyst and glycerol carbonate, which is applied in the preparation of organic carbonates, etc., to achieve the effects of easy regeneration, good stability, and easy separation

Inactive Publication Date: 2013-04-03
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The solid base catalysts currently reported mainly include several types of catalyst systems such as alkaline earth metal oxides and hydroxyapatite, and the supported solid base catalyst prepared by loading alkali metal oxides as active components on Mg-Al hydrotalcite The reaction used to synthesize glycerol carbonate by glycerol transesterification has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Li 2 Preparation and Application of O / Mg-Al Hydrotalcite Catalyst

[0030] 1. According to the Mg:Al molar ratio of 1:1, Mg(NO 3 ) 2 and Al(NO 3 ) 3 Dissolve in distilled water to make Mg 2+ and Al 3+ The total concentration is solution A of 0.9 mol / L; another certain amount of sodium hydroxide and sodium carbonate is dissolved in distilled water to form solution B with a total concentration of alkali metal ions of 1.98 mol / L, and the concentration of alkali metal salt in solution B is Adding amount is Al 3+ 40% of moles;

[0031] 2. Add 100 ml of distilled water to a 500ml four-necked flask equipped with a thermometer, mechanical stirring, and constant pressure funnel, raise the temperature to 90°C under uniform stirring, and then dissolve solutions A and B within 1 hour at this temperature And add it dropwise into the flask, keep the pH value of the mixed solution at 9.5 during the dropwise addition, adjust the final pH value to 11 by adding KOH after the drop...

Embodiment 2

[0041] Na 2 Preparation and Application of O / Mg-Al Hydrotalcite Catalyst

[0042] 1. According to the Mg:Al molar ratio of 2:1, Mg(NO 3 ) 2 and Al(NO 3 ) 3 Dissolve in distilled water to make Mg 2+ and Al 3+ The total concentration is solution A of 1.1 mol / L; another certain amount of potassium hydroxide and sodium carbonate are dissolved in distilled water to form solution B with a total concentration of alkali metal ions of 1.86 mol / L, and the concentration of alkali metal salt in solution B is Adding amount is Al 3+ 60% of moles;

[0043] 2. Add 100 ml of distilled water to a 500ml four-necked flask equipped with a thermometer, mechanical stirring, and constant pressure funnel, raise the temperature to 60°C under uniform stirring, and then dissolve solutions A and B within 3 hours at this temperature And add it dropwise into the flask, keep the pH value of the mixed solution at 8.0 during the dropwise addition, adjust the final pH value to 9.5 by adding KOH after th...

Embodiment 3

[0053] K 2 Preparation and Application of O / Mg-Al Hydrotalcite Catalyst

[0054] 1. According to the Mg:Al molar ratio of 3:1, Mg(NO 3 ) 2 and Al(NO 3 ) 3 Dissolve in distilled water to make Mg 2+ and Al 3+ The total concentration is solution A of 1.0 mol / L; another certain amount of sodium hydroxide and sodium carbonate is dissolved in distilled water to form solution B with a total concentration of alkali metal ions of 2.53 mol / L, and the concentration of alkali metal salt in solution B is Adding amount is Al 3+ 50% of moles;

[0055] 2. Add 100 ml of distilled water to a 500ml four-necked flask equipped with a thermometer, mechanical stirring, and constant pressure funnel, raise its temperature to 80°C under uniform stirring, and then dissolve solutions A and B within 2 hours at this temperature And add it dropwise into the flask, keep the pH value of the mixed solution at 9.0 during the dropwise addition, adjust the final pH value to 10 by adding NaOH after the dro...

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Abstract

The invention relates to a solid base catalyst for synthesis of glycerol carbonate. The catalyst is composed of 0.66%-28.77% by mass of a base metal oxide and the balance Mg-Al hydrotalcite, with the base metal oxide loaded on the Mg-Al hydrotalcite. Specifically, in the Mg-Al hydrotalcite, Mg and Al are in a mole ratio of 1-5:1. The solid base catalyst provided in the invention has the advantages of good stability, no pollution, and high activity.

Description

technical field [0001] The invention belongs to a catalyst, its preparation method and application, and in particular relates to a supported catalyst for synthesizing glycerol carbonate, its preparation method and application. Background technique [0002] About 10% (mass fraction) of by-product glycerol is produced in the biodiesel production process, and the rapid development of the biodiesel industry has led to an increasingly serious surplus of glycerol. In recent years, the production of high value-added products using glycerol as a platform compound has attracted the attention of researchers at home and abroad; among them, glycerol carbonate, as a high value-added downstream product of glycerol, is widely used in coatings, adhesives, and cosmetics. Modifiers and solvents in pharmaceutical preparations and components of gas separation membranes. [0003] The methods for synthesizing glycerol carbonate from glycerol are mainly carbon monoxide method, phosgene method, ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/04C07C69/96C07C68/06
Inventor 亢茂青刘振民王军威李其峰殷宁赵雨花冯月兰张清运王心葵
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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